Not bad
This is definately one of your better works. I think the chorus part with the longer strings would have a better impact if you had a different chord progression in there. Also I think a break with just a drum beat and some sort of bass synth solo would be good.
Also, lay off the swears a bit- a few are alright I guess, but the whole part towards the end when you are talking about your fans and every other word is cussing- it just sounds obnoxious. If you ever make it big it would sound a little better, but it just sounds like you are trying to look cool right now.
Also, when you say Mother Fucker one time you sound like you are constipated (you're yelling or somthing).
" I'm never going to fucking stop"
...fucking? why? Use swears to accent a point, dont just throw it in there.
Don't get me wrong, I was pretty impressed with your rapping style and the lyrics are pretty solid too. Do somthing that makes you stand out and you may get noticed.